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Four green DDR5 RDIMM sticks in anti-static tray

NEMIX RAM

NEMIX RAM RS520A-E12-RS24U 128GB (4x32GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-QV5W-T0EW2 MPN RS520A-E12-RS24U

128 GB DDR5 ECC registered server memory kit, four 32 GB modules at 4800 MT/s CL40 1.10 V for ASUS RS520A-E12-RS24U

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB capacity across four 32GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth
  • ECC registered design protects data integrity
  • 1V operation reduces power draw
  • Validated for ASUS RS520A-E12-RS24U server

System-specific DDR5 ECC kit

This 128 GB kit contains four 32 GB DDR5 4800 registered DIMMs built for the ASUS RS520A-E12-RS24U server. Each module runs at 1.10 V with CL40 latency and uses 1Rx4 organisation. The memory is ECC RDIMM type with 288 pins and carries no heat spreader.

Compatibility and limitations

The kit is validated only for the named ASUS single-socket 2U server model. Systems that require unbuffered UDIMMs, non-ECC memory, lower speeds, different pin counts or higher capacities per module cannot use this kit. Buyers needing consumer desktop memory or laptop SO-DIMMs should look elsewhere.

Registered ECC RDIMM form factor

Registered ECC RDIMM is the single specification that determines fit; the motherboard must accept 288-pin DDR5 RDIMMs with on-board register and ECC support. Without that requirement the modules will not function.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $3,518.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.49 per GB
Pricier than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-314K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does this kit use the DDR5 4800 (PC5-38400) standard and what does that mean for speed?

The kit runs at DDR5 4800 with a PC5-38400 rating and CL40 latency, providing 4800 MT/s data transfer per module.

What physical slot and form factor do these modules need to fit the ASUS RS520A-E12-RS24U server?

Each module is a 288-pin DDR5 RDIMM measuring standard DIMM height; the server requires four such slots populated for this 4x32GB kit.

How are these registered ECC modules installed, and what step is often missed?

Power down, open the chassis, align the notch on each 288-pin RDIMM with the slot key, press firmly until both latches click, then verify all four modules are recognised in BIOS.

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